The sources, who spoke on condition of anonymity and who included one US official, said a US decision could come as early as on Monday to renew waivers to sanctions that bar non-US firms from dealing with Iran's Atomic Energy Organization.
Jewish News Syndicate (JNS), a news outlet predominantly focused on Israel and the Jewish world, first reported the United States was expected to renew the waivers, citing two sources familiar with the decision.
The move by the Trump administration, which in 2018 withdrew from the 2015 Iran nuclear deal and reimposed sanctions on Iran, will allow nonproliferation work to continue at the Arak heavy-water research reactor, the Bushehr nuclear power plant, the Tehran Research Reactor and other nuclear initiatives.
Tehran has long rejected Western assertions that it has sought to develop nuclear weapons.
The waivers would be a rare breather in a hardened US policy toward Iran. Washington last week blacklisted five Iran- and Iraq-based companies and 15 individuals for supporting terrorist groups, its third round of sanctions on Iranian targets in two weeks even as it is one of the countries hit by the coronavirus outbreak.